1 /*
2  * Copyright 2014, Michael Ellerman, IBM Corp.
3  * Licensed under GPLv2.
4  */
5 
6 #include <stdio.h>
7 #include <stdlib.h>
8 
9 #include "ebb.h"
10 
11 
12 /*
13  * Basic test that counts user cycles and takes EBBs.
14  */
15 int cycles(void)
16 {
17 	struct event event;
18 
19 	event_init_named(&event, 0x1001e, "cycles");
20 	event_leader_ebb_init(&event);
21 
22 	event.attr.exclude_kernel = 1;
23 	event.attr.exclude_hv = 1;
24 	event.attr.exclude_idle = 1;
25 
26 	FAIL_IF(event_open(&event));
27 
28 	ebb_enable_pmc_counting(1);
29 	setup_ebb_handler(standard_ebb_callee);
30 	ebb_global_enable();
31 	FAIL_IF(ebb_event_enable(&event));
32 
33 	mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
34 
35 	while (ebb_state.stats.ebb_count < 10) {
36 		FAIL_IF(core_busy_loop());
37 		FAIL_IF(ebb_check_mmcr0());
38 	}
39 
40 	ebb_global_disable();
41 	ebb_freeze_pmcs();
42 
43 	count_pmc(1, sample_period);
44 
45 	dump_ebb_state();
46 
47 	event_close(&event);
48 
49 	FAIL_IF(ebb_state.stats.ebb_count == 0);
50 	FAIL_IF(!ebb_check_count(1, sample_period, 100));
51 
52 	return 0;
53 }
54 
55 int main(void)
56 {
57 	return test_harness(cycles, "cycles");
58 }
59